The Stones of Elucidation

 is a side quest in Tyranny.

Synopsis
Hieronymus wants you to get the two Stones of Elucidation from the Oldwalls Breach.

Walkthrough

 * Enter the breach. There are two stones:
 * The first is in the upper left chamber of Central. Cross the bridge, pick up the Stone of Elucidation. Use a piece of rubble found nearby to weight the altar down to return.
 * The second is in the chamber by the entrance of the western section. Reach it by activating the toggle switch with one character and entering with others.
 * Return to Hieronymus.